There is such a thing as too much of a good thing. If it delicately highlights her features and gives her skin a clean look, it's a good thing. If it makes her look like a cartoon character, it's not really my thing.
Not to change the subject, but kissing a girl wearing a load of foundation or other cosmetics is not a pleasant experience.
just make sure the lines are very clean and not smudgy or too choppy and everything should be fine.
it's not bad. plus if you are going to a party more makeup is expected. you don't always have to do the natural look. when guys say they don't like too much makeup they are talking about this: link because it's obviously heavily applied and she's emphasizing eyes, cheeks and lips at the same time